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| [in physical_chemistry] a distinct state of matter in a system; matter that is identical in chemical composition and physical state and separated from other material by the phase boundary | ||||
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| any distinct time period in a sequence of events | ||||
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| ciascuna delle fasi in cui si articola un processo, o ciascuno dei momenti intermedi di una progressione | ||||
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| [in astronomy] the particular appearance of a body's state of illumination (especially one of the recurring shapes of the part of Earth's moon that is illuminated by the sun) |